Senior Full Stack Software Engineer (Python, React), Remote, Madrid/BarcelonaHelp build high-performance web applications used by thousands of users.
Sea uno de los primeros solicitantes, lea la descripción completa del puesto a continuación y luego envíe su candidatura para que sea considerada.
We're looking for a Senior Full Stack Software Engineer with a strong backend focus in Python and solid React experience to help design and scale modern web applications. This role is ideal for someone who enjoys solving complex engineering challenges, making architectural decisions, and building systems designed for reliability and performance at scale.You'll work closely with engineers and stakeholders to deliver robust, user-friendly applications while contributing to both backend architecture and modern frontend improvements.
About the RoleAs a Senior Full Stack Engineer, you will play a key role in shaping the technical direction of the platform. You'll lead backend architecture decisions, build scalable services, and help evolve the frontend experience using modern technologies.The platform supports thousands of concurrent users and high-frequency external integrations, so performance, stability, and scalability are critical.You'll also help drive engineering best practices, improve testing coverage, and contribute to continuous technical improvements across the stack.
What You'll Be DoingLeading the design and development of backend services using PythonBuilding scalable APIs and services capable of supporting high traffic and concurrent usersContributing to modern frontend development using React and TypeScriptMaking key architectural and technical decisionsImproving system performance, reliability, and scalabilityWriting well-tested backend and frontend codeImplementing end-to-end and integration testing using PlaywrightCollaborating with engineers and stakeholders to deliver high-quality solutionsSupporting ongoing technology improvements and engineering best practices
What We're Looking ForSolid professional background developing backend services with PythonSeveral years of experience working with JavaScript for web applications, ideally using ReactProven track record building scalable web platforms and API-driven applicationsExperience designing systems that prioritise stability, efficiency, and high performanceStrong understanding of modern backend design patterns and scalable architecturesHands-on experience implementing automated testing and maintaining reliable codebasesConfidence in contributing to architectural discussions and influencing technical directionExperience with technologies such as:Python, FastAPI, ReactJS, TypeScript, Tailwind, ViteRedis, MongoDB, PostgreSQL, AlembicDocker, Kubernetes, Azure DevOps, AWSExperience with infrastructure or DevOps practices is a plus, but not mandatory as deployments and operations are handled by a dedicated infrastructure team.
Additional DetailsLocation: Remote, candidates must be based in Madrid or BarcelonaContract type: 6-month B2B contract, with possibility to extendExperience level: Senior Software EngineerLanguage: Professional English proficiency requiredWe're looking for engineers who bring a strong backend mindset, solid testing practices, and a proactive attitude toward continuous improvement .
Interested? xiphtebIf you're excited about building scalable systems, solving challenging engineering problems, and working with modern technologies, we'd love to hear from you.Apply via LinkedIn or reach out directly to discuss the opportunity.